Because the noun books is plural, the apostrophe that shows it's a possessive goes after the s: books'.
Example: Most of the books' covers were undamaged.
If a noun is singular, the apostrophe usually goes before the s: book's. So, if the noun is plural: The books' important lessons made a positive impression on everyone who read them. (More than one book.) But if it's singular: The book's important lessons made a positive impression on everyone who read it. (Just one book.)
Yes, the form book's is the singular possessive form.Example: The book's cover is torn.The plural form for the noun book is books; the plural possessive form is books'.
The possessive form of the plural noun teachers is teachers'.The possessive form for "the books of the teachers" is "the teachers' books".
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is valleys. The plural possessive is valleys'.
The plural form is replies. The plural possessive is replies'.
The plural form is founders. The plural possessive is founders'.
No, it is singular, the possessive form of it is its. The plural form of it is they or them, and the possessive form is their.To answer the question directly: there is no such word as ITS'.
The plural form is branches. The plural possessive is branches'.
The plural possessive form of "mass" is "masses'".
The plural possessive is experiments'.
The plural form is ravines. The plural possessive is ravines'.
The plural form of the noun mouthful is mouthfuls.The plural possessive form is mouthfuls'.